[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: When to design an attribute in a namespace?
Speaking for XML Schema: I believe this comes down to whether or not you would like the attribute to be considered as part of the "vocabulary" that the schema defines. That is a conceptual criterion - but a more concrete criterion would be whether or not you want to ensure that, when the schema is imported into another schema, there is no "collision" due to the importing schema having a no-namespace attribute of the same name. Kind Regards, Joe Chiusano Booz | Allen | Hamilton Strategy and Technology Consultants to the World kynn@p... wrote: > > In http://www.rpbourret.com/xml/NamespacesFAQ.htm#q5_3, it says: > > ...the purpose of XML namespaces is to uniquely identify element > and attribute names. Unprefixed attribute names can be uniquely > identified based on the element type to which they belong, so > there is no need identify them further by including them in an > XML namespace. In fact, the only reason for allowing attribute > names to be prefixed is so that attributes defined in one XML > language can be used in another XML language. > > This quote suggests that, when designing a schema/DTD one can safely > let most (if not all) attributes have no namespace (i.e. be > "unprefixed"); the designer only rarely should need to specify an > attribute as belonging to a namespace (i.e. requiring a prefix). > > But I am interested in learning to recognize those rare situations > in which, as a designer, one *should* put a particular attribute > in a namespace. This is still very unclear to me. What are the > requirements that an attribute must fulfill to be a good candidate > for being placed in a namespace by the schema/DTD designer? > Thanks! > > kj > > ----------------------------------------------------------------- > The xml-dev list is sponsored by XML.org <http://www.xml.org>, an > initiative of OASIS <http://www.oasis-open.org> > > The list archives are at http://lists.xml.org/archives/xml-dev/ > > To subscribe or unsubscribe from this list use the subscription > manager: <http://www.oasis-open.org/mlmanage/index.php> -- Kind Regards, Joseph Chiusano Associate Booz | Allen | Hamilton
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